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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_VIEWS_CONTROLS_TABLE_TABLE_HEADER_H_
#define UI_VIEWS_CONTROLS_TABLE_TABLE_HEADER_H_
#include "ui/gfx/font.h"
#include "ui/views/view.h"
#include "ui/views/views_export.h"
namespace views {
class TableView;
// Views used to render the header for the table.
class VIEWS_EXPORT TableHeader : public views::View {
public:
// Amount the text is padded on the left/right side.
static const int kHorizontalPadding;
// Amount of space reserved for the indicator and padding.
static const int kSortIndicatorWidth;
explicit TableHeader(TableView* table);
virtual ~TableHeader();
const gfx::Font& font() const { return font_; }
// views::View overrides.
virtual void Layout() OVERRIDE;
virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
virtual gfx::Size GetPreferredSize() OVERRIDE;
virtual gfx::NativeCursor GetCursor(const ui::MouseEvent& event) OVERRIDE;
virtual bool OnMousePressed(const ui::MouseEvent& event) OVERRIDE;
virtual bool OnMouseDragged(const ui::MouseEvent& event) OVERRIDE;
virtual void OnMouseReleased(const ui::MouseEvent& event) OVERRIDE;
virtual void OnMouseCaptureLost() OVERRIDE;
private:
// Used to track the column being resized.
struct ColumnResizeDetails {
ColumnResizeDetails() : column_index(0), initial_x(0), initial_width(0) {}
// Index into table_->visible_columns() that is being resized.
int column_index;
// X-coordinate of the mouse at the time the resize started.
int initial_x;
// Width of the column when the drag started.
int initial_width;
};
// Returns the column to resize given the specified x-coordinate, or -1 if |x|
// is not in the resize range of any columns.
int GetResizeColumn(int x) const;
bool is_resizing() const { return resize_details_.get() != NULL; }
const gfx::Font font_;
TableView* table_;
// If non-null a resize is in progress.
scoped_ptr<ColumnResizeDetails> resize_details_;
DISALLOW_COPY_AND_ASSIGN(TableHeader);
};
} // namespace views
#endif // UI_VIEWS_CONTROLS_TABLE_TABLE_HEADER_H_
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